/*!
 * LABELAUTY jQuery Plugin
 *
 * @file: jquery-labelauty.js
 * @author: Francisco Neves (@fntneves)
 * @site: www.francisconeves.com
 * @license: MIT License
 */

(function( $ ){

    $.fn.labelauty = function( options )
    {
        /*
         * Our default settings
         * Hope you don't need to change anything, with these settings
         */
        var settings = $.extend(
            {
                // Development Mode
                // This will activate console debug messages
                development: false,

                // Trigger Class
                // This class will be used to apply styles
                class: "labelauty",

                // Use text label ?
                // If false, then only an icon represents the input
                label: true,

                // Separator between labels' messages
                // If you use this separator for anything, choose a new one
                separator: "|",

                // Default Checked Message
                // This message will be visible when input is checked
                checked_label: "Checked",

                // Default UnChecked Message
                // This message will be visible when input is unchecked
                unchecked_label: "Unchecked",

                // Minimum Label Width
                // This value will be used to apply a minimum width to the text labels
                minimum_width: false,

                // Use the greatest width between two text labels ?
                // If this has a true value, then label width will be the greatest between labels
                same_width: true
            }, options);

        /*
         * Let's create the core function
         * It will try to cover all settings and mistakes of using
         */
        return this.each(function()
        {
            var $object = $( this );
            var use_labels = true;
            var labels;
            var labels_object;
            var input_id;

            // Test if object is a check input
            // Don't mess me up, come on
            if( $object.is( ":checkbox" ) === false && $object.is( ":radio" ) === false )
                return this;

            // Add "labelauty" class to all checkboxes
            // So you can apply some custom styles
            $object.addClass( settings.class );

            // Get the value of "data-labelauty" attribute
            // Then, we have the labels for each case (or not, as we will see)
            labels = $object.attr( "data-labelauty" );

            use_labels = settings.label;

            // It's time to check if it's going to the right way
            // Null values, more labels than expected or no labels will be handled here
            if( use_labels === true )
            {
                if( labels == null || labels.length === 0 )
                {
                    // If attribute has no label and we want to use, then use the default labels
                    labels_object = new Array();
                    labels_object[0] = settings.unchecked_label;
                    labels_object[1] = settings.checked_label;
                }
                else
                {
                    // Ok, ok, it's time to split Checked and Unchecked labels
                    // We split, by the "settings.separator" option
                    labels_object = labels.split( settings.separator );

                    // Now, let's check if exist _only_ two labels
                    // If there's more than two, then we do not use labels :(
                    // Else, do some additional tests
                    if( labels_object.length > 2 )
                    {
                        use_labels = false;
                        debug( settings.development, "There's more than two labels. LABELAUTY will not use labels." );
                    }
                    else
                    {
                        // If there's just one label (no split by "settings.separator"), it will be used for both cases
                        // Here, we have the possibility of use the same label for both cases
                        if( labels_object.length === 1 )
                            debug( settings.development, "There's just one label. LABELAUTY will use this one for both cases." );
                    }
                }
            }

            /*
             * Let's begin the beauty
             */

            // Start hiding ugly checkboxes
            // Obviously, we don't need native checkboxes :O
            $object.css({ display : "none" });

            // We don't need more data-labelauty attributes!
            // Ok, ok, it's just for beauty improvement
            $object.removeAttr( "data-labelauty" );

            // Now, grab checkbox ID Attribute for "label" tag use
            // If there's no ID Attribute, then generate a new one
            input_id = $object.attr( "id" );

            if( input_id == null )
            {
                var input_id_number = 1 + Math.floor( Math.random() * 1024000 );
                input_id = "labelauty-" + input_id_number;

                // Is there any element with this random ID ?
                // If exists, then increment until get an unused ID
                while( $( input_id ).length !== 0 )
                {
                    input_id_number++;
                    input_id = "labelauty-" + input_id_number;
                    debug( settings.development, "Holy crap, between 1024 thousand numbers, one raised a conflict. Trying again." );
                }

                $object.attr( "id", input_id );
            }

            // Now, add necessary tags to make this work
            // Here, we're going to test some control variables and act properly
            $object.after( create( input_id, labels_object, use_labels ) );

            // Now, add "min-width" to label
            // Let's say the truth, a fixed width is more beautiful than a variable width
            if( settings.minimum_width !== false )
                $object.next( "label[for=" + input_id + "]" ).css({ "min-width": settings.minimum_width });

            // Now, add "min-width" to label
            // Let's say the truth, a fixed width is more beautiful than a variable width
            if( settings.same_width != false && settings.label == true )
            {
                var label_object = $object.next( "label[for=" + input_id + "]" );
                var unchecked_width = getRealWidth(label_object.find( "span.labelauty-unchecked" ));
                var checked_width = getRealWidth(label_object.find( "span.labelauty-checked" ));

                if( unchecked_width > checked_width )
                    label_object.find( "span.labelauty-checked" ).width( unchecked_width );
                else
                    label_object.find( "span.labelauty-unchecked" ).width( checked_width );
            }
        });
    };

    /*
     * Tricky code to work with hidden elements, like tabs.
     * Note: This code is based on jquery.actual plugin.
     * https://github.com/dreamerslab/jquery.actual
     */
    function getRealWidth( element )
    {
        var width = 0;
        var $target = element;
        var style = 'position: absolute !important; top: -1000 !important; ';

        $target = $target.clone().attr('style', style).appendTo('body');
        width = $target.width(true);
        $target.remove();

        return width;
    }

    function debug( debug, message )
    {
        if( debug && window.console && window.console.log )
            window.console.log( "jQuery-LABELAUTY: " + message );
    };

    function create( input_id, messages_object, label )
    {
        var block;
        var unchecked_message;
        var checked_message;

        if( messages_object == null )
            unchecked_message = checked_message = "";
        else
        {
            unchecked_message = messages_object[0];

            // If checked message is null, then put the same text of unchecked message
            if( messages_object[1] == null )
                checked_message = unchecked_message;
            else
                checked_message = messages_object[1];
        }

        if( label == true )
        {
            block = '<label for="' + input_id + '">' +
                '<span class="labelauty-unchecked-image"></span>' +
                '<span class="labelauty-unchecked">' + unchecked_message + '</span>' +
                '<span class="labelauty-checked-image"></span>' +
                '<span class="labelauty-checked">' + checked_message + '</span>' +
                '</label>';
        }
        else
        {
            block = '<label for="' + input_id + '">' +
                '<span class="labelauty-unchecked-image"></span>' +
                '<span class="labelauty-checked-image"></span>' +
                '</label>';
        }

        return block;
    };

}( jQuery ));

